Spring bed-bottom



(No Model.)

L. W. BOYNTON.

' SPRING BED BOTTOM. No. 321,419. Patented July 7, 1885.

Fil I A llhvirnn STATES aren't @rricis.

LEANDER WV. BOYNTON, OF HARTFORD, CONNECTICUT.

SPRING BED-BOTTOM.

SPECIFICATION forming part of Letters Patent No. 321,419, dated July 7, 1885.

{No model.)

To all whom it may concern:

Be it known that I, LEANDER WV. BOYNTON, of Hartford, Connecticut, haveinvented a new and useful Improvement in Spring Fabrics, of which the following description and claims constitute the specification, and which is illustrated by the accompanying sheet of drawings.

Figure 1 of the drawings is a plan view of a spring bed-bottom embodying this invention. Fig. 2- is a side view of the same. Fig. 3 is a cross scction of the left-hand end piece of the frame with sundry features of the invention attached thereto, and Fig. 4 is a plan view of a fragment of that end piece and with the same attachments. Fig. 5 is a crosssection of the righthand end piece with similar attachments, and Fig. 6 is a plan view of a fragment of that end piece with the same attachments as those of Fig. 5.

A and B are the side pieces, and C and D the corner pieces. of the bed-frame, while E and F are the left-hand and right-hand end pieces, respectively.

G is one of a series of springs, V-shaped in plan view, and having the forks of the V bent into semicircles, substantially as shown in the drawings. The spring G consists of a wire bent centrally in form, having its branches diverging and extending rearward and downward and curved downward in rear, terminating in forwardly-extending parallel prongs to be inserted into the rail.

H is one of a series of springs, V-shaped in plan view, and having the forks of the V bent into circles or coils, substantially as shownin the drawings.

The springs G and H are fastened to the end pieces by having their fork ends driven into the wood which composes those end pieces.

I is one of a series of convex hooked end springs. There are thirteen series of these springs in Fig. 1, and each spring is bent so as to present its convex side upward, as shown in Fig. 3.

J is one of a series of serpentine springs, each end of each of which is a ring-like coil of the end of the wire of which the spring is composed. There are twelve such springs in Fig. 1. Those in the middle are heavier than those nearer the ends.

The novel features of this fabric are the following: first, the springs G and H, which are identical in principle, differing only in the de gree in which they respectively embody that principle; second, the springs I, being made bent, with convex side upward, instead of having their bodies substantially straight, as heretofore; third, the springs J, being made of variant weight and size of wire.

The mode of operation of these novel features is, respectively, as follows: The springs G and H, encircling, as they do, part or all of the end piece to which they are respectively attached, and touching that end piece only at the point where fastened thereto and thereabout, much increase the elasticity of the wire fabric of which they form a part or parts. The springs I, having, as they do, bent bodies, with the convex sides upward, cause the wire fabric to become and remain uniformly flat when pressed downward. by superincum bent weight; whereas if, as heretofore, those springs had straight bodies, that weight would press them into a bent form with the concave side upward, and would thus cause the fabric to become and remain uneven in respect of its general upper surface. The springs J, being made of variant sizes and consequent stiffness of wire, and with the larger and stiffer specimens in the middle of the fabric, cause the sagging of the bed to be nearly uniform from end to end, instead of, heretofore, to be most marked at the middle. This result follows from the fact that the larger and stiffer wires have less elasticity than the others, and therefore sag less than they in proportion to the superincumbcnt Weight resting upon them.

The mode of operation of the entire bed differs from that of other similar beds in that the superincunibent weight causes it to sag nearly uniformly from end to end, instead of sagging mainly in the middle and not at all at the ends of the bed. The features which produce this general mode of operation are the springs G and H and the variant sizes of the springs J. I prefer to make those springs vary in size by regular gradations; but they may consist of only two sizes, or may vary with irregular gradations.

I claim as my invention- 1. The combination of a bed-bottom frame branches extending rearwardly and curved with a series of two 01' more Vshaped springs, downwardly, and terminating in forwardly- 10 G, and with a series of two or more serpenextending parallel prongs to be inserted into tine springs, J, and with a series of two or more the rail, substantially as specified.

5 hook-springs, I, all substantially as described LEANDER W. BOYNTON.

and shown. Witnesses:

2. In a bed-bottom, the wire spring bent ALBERT H. XVALKER, centrally in V form, and having its diverging A. K. BROCKLESBY. 

